"cowardly," 1900, from gut (n.) in the figurative "spirit" sense (see guts) + -less. Literal sense "disemboweled" is from c. 1600. Related: Gutlessly; gutlessness.
例文
1. He was a yellow gutless worm.
彼は臆病で勇気のない哀れな虫だ。
2.By attacking me,by attacking my wife,he has proved himself to be a gutless coward.